/*
 * Copyright 2016 The Netty Project
 *
 * The Netty Project licenses this file to you under the Apache License,
 * version 2.0 (the "License"); you may not use this file except in compliance
 * with the License. You may obtain a copy of the License at:
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 * License for the specific language governing permissions and limitations
 * under the License.
 */
package io.netty.handler.codec;

import io.netty.microbench.util.AbstractMicrobenchmark;
import io.netty.util.internal.RecyclableArrayList;
import org.openjdk.jmh.annotations.Benchmark;
import org.openjdk.jmh.annotations.Level;
import org.openjdk.jmh.annotations.Param;
import org.openjdk.jmh.annotations.Scope;
import org.openjdk.jmh.annotations.Setup;
import org.openjdk.jmh.annotations.State;
import org.openjdk.jmh.annotations.TearDown;

import java.util.ArrayList;
import java.util.List;

@State(Scope.Benchmark)
public class CodecOutputListBenchmark extends AbstractMicrobenchmark
{

    private static final Object ELEMENT = new Object();

    private CodecOutputList codecOutputList;

    private RecyclableArrayList recycleableArrayList;

    private List<Object> arrayList;

    @Param(
    { "1", "4" })
    public int elements;

    @Setup(Level.Invocation)
    public void setup()
    {
        codecOutputList = CodecOutputList.newInstance();
        recycleableArrayList = RecyclableArrayList.newInstance(16);
        arrayList = new ArrayList<Object>(16);
    }

    @TearDown
    public void destroy()
    {
        codecOutputList.recycle();
        recycleableArrayList.recycle();
    }

    @Benchmark
    public void codecOutList()
    {
        benchmarkAddAndClear(codecOutputList, elements);
    }

    @Benchmark
    public void recyclableArrayList()
    {
        benchmarkAddAndClear(recycleableArrayList, elements);
    }

    @Benchmark
    public void arrayList()
    {
        benchmarkAddAndClear(arrayList, elements);
    }

    private static void benchmarkAddAndClear(List<Object> list, int elements)
    {
        for (int i = 0; i < elements; i++)
        {
            list.add(ELEMENT);
        }
        list.clear();
    }
}
